If it is not a recurring decimal, I would find out how many decimal places I need to move to the right on the denominator to make it an integer (whole number). Then I add the same number of zeroes on the numerator and divide by the integer.
For example:
for 20/0.5 we need to move one position to the right.
So
20/0.5
= 200/5
= 40

Try
275/3.14 (we need to move the decimal 2 position to the right)

275/3.14
=27500/314
=87 182/314
=87 91/157

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